Hydraulic jack and clutch for lifting mechanism.



H. B. PETRIB.

HYDRAULIC JACK AND CLUTCH FOR LIFIING MECHANISM.

APPLICATION FILED OCT. 22, 1912.

Patented Nov. 17, 1914.

2 SHBETS'SHEET l.

a M1412 I 2% 6. 3201? wwwmw mm,

THE NORRIS PETERS 50.. PHOTU-L|THO.. WASHINGTON. D. C

E. B. PETRIE. HYDRAULIC JACK AND CLUTCH FOR LIFTING MECHANISM.

APPLICATION FILED 0011222, 1912.

2 SHEETS-SHEET 2.

Patented Nov. 17, 1914.

rrnp STATES PATENT oriuon.

ENOS B. PETRIE, OF NEW YORK, N. Y.

HYDRAULIC JACK AND CLUTCH FOR LIF'IING MECHANISM.

To all whom it may concern Be it known that I, Enos B. Pn'rmn, of the city of New York, county of Kings, and State of New York, have invented a new and useful Improvement in Hydraulic Jacks and Clutches for Lifting Mechanism, of which the following is a full, clear, and exact description.

My invention relates to improvements in hydraulic jacks and clutches for lifting mechanism, and more especially to those used for raising sunken vessels, and the object of my invention is to provide my lifting jacks and clutches in such a manner that they will work positively and in a manner to conveniently handle great weights while at the same time they can be easily and perfectly operated without sticking or becoming deranged.

Another obect of my invention is to arrange the parts so that in case of a sudden gale or rough sea, I can immediately and readily release all the lifting cables. thus freeing the vessels used in hoisting and permitting the sunken vessel to sink back to its bed. This'is very important as it sometimes happens that during the hoisting operations a rough sea or gale will spring up, and if the vessels used in hoisting cannot be cast loose, they are likely to be wrecked, or at least seriously damaged.

My invention provides for other impro ements which will be pointed out in the specification and drawings.

Reference is to be had to the accom an ing drawings forming a part of this specificat on, in which similar reference characters indicate corresponding parts in all the views.

Figure 1 is a side elevation of my invention, and Fig. 2 is a front elevation of Fig. 1.

The lifting apparatus can be sustained in any suitable framework, and as shown the framework 24 (see Fig. 2) is used. which can be of any suitable type, and in this are supported a pair of jack cylinders 25, but the hydraulic jacks can be of any usual type. Also I wish it understood that a pair of jacks, or any desired number, can be used, without affecting the principle of the invention. These cylinders 25 are supported on a bed-plate 26, which is arranged in the frame 24, and this bed-plate has a port 27 connecting as shown at 28 with the cylinders 25, and connecting also with the pipe Specification of Letters Patent. Patented N 1'7, 1914, Application filed October 22, 1912. Serial No. 727,151.

29 through which the pressure liquid is pumped. This liquid is preferably oil and water, but can be any preferred liquid. The cylinders carry the usual rams or plungers 30, the upper ends of which abut withthe cross-head 31 of the sliding clutch C which moves in the framework 34:, and which can be any preferred form of clutch, though it 18 preferably controlled by hydraulic jacks. as this enables the clutch to be operated with SllfllOiGIlt pressure, and provides for easy clearance when necessary, as willbe hereinafter described.

I have shown a simple form of clutch in which opposed members or blocks are adapted to impinge on the lifting cable 22, so that when the plungers or rams 30 are forced upward. the blocks will becarried with them and the cable raised without slipping so as to lift a vessel. These blocks 22 are normally opened by powerful springs :34, and they slide on bolts 33 which also project through the. framework or boxing 35 of the jacks which close the clutches. These jacks canbe of the usual h draulic type, or of any preferred type. As shown they comprise the cylinders 36 which have plungers or rams 37 working against one of the blocks 32, and the bolts 33 with their heads and nuts. serve to space the framework 35 from the outer block 32, so that when pressure is applied within the cvl inder 36, the inner block is forcibly moved against the tension of the spring 3i. and upon the cable 22. H

Directly below the c linder 25 is a stationary clutch C which is similar to the clutch C already described. The clutch (3, however, because of its movement, must have a longitudinally adjustable pipe con nection to supply the pressure fluid. and to this end I have shown a pipe 38 supplying the jacks. this having a sliding connection with a pipe 39. The lower jacks, however, can connect with the stationary pipe 38. I have not given the detail of the water connections with the jacks of the clutches, because this can be of any suitable or usual character.

The lifting cables being in position beneath a sunken vessel, the liftingapparatus is then set in operation. The lower clutches C of the lifting apparatus are released, and the upper clutches 0 closed by means of the jacks already described upon the cable 22. The pressure liquid is then admitted to the cylinder 25, and the rams 30 lift the upper clutches 32 until the rams are fully extended. At this point the lower clutches C are closed upon the cable 22, and the pressure liquid is released from the clutches C and from the lifting jacks, so that the upper clutches and the rains 3O slide back to the initial position, when the operation is repeated.

It will be seen that in case of a high sea or of any occurrence Which makes it necessary to cast loose, the lower clutches and upper clutches may both be released by re leasing the pressure of the liquid from the jacks, and the cables 22 Will then slide freely through the clutches so as to permit the vessel to drop back. When the vessel is being raised, it will be understood that the slack from the ends of the lifting cables 22 can be taken care of in any usual or preferred manner.

I claim 1. An apparatus of the class described, comprising independent grippers for sepa rately engaging a movable member, fluid actuated means for separately operating said grippers to engage and release said member and fluid actuated means for moving one of said grippers longitudinally of said member.

2. An apparatus of the class described, comprising a stationary gripper for a movable member, a second gripper for the casing movable relatively to the first gripper in the line of said movable member, fluid actuated means for separately operating said grippers to engage and release said movable member and fluid actuated means for effecting the relative movement of the second gripper.

3. An apparatus of the class'described, comprising a stationary lower gripper for a movable member, an upper gripper for said member movable in the line of said member, fluid actuated means for separately operating said grippers to engage and release said member and fluid-actuated means for effecting the linealmovement of the upper grlp er.

' 4 An apparatus of the class described, comprising independent grippers for separately engaging a movable member, one above the other, one of said grippers being movable relatively to the other in the line of said member, fluid jacks carrying said last named gripper, controllable fluid pressure connections to operate said jacks to effect the relative movement of said gripper and fluid actuated means for separately operating said grippers to engage and release said member.

5. An. apparatus such as described comprising hydraulic jacks, cable engaging clutches at opposite ends of the jacks, one of the clutches being moved bodily by the jacks and the other clutch having a stationary position to the jacks, and spring means for releasing the cable.

6. An apparatus of the kind described comprising hydraulic jacks, cable engaging clutches at opposite ends of the jacks, oneof the clutches being moved bodily by the jacks and the other clutch having a stationary position to the jacks, independent jacks to operate the clutches, and spring means to release the clutches.

7. An apparatus of the kind described comprising a framework, hydraulic jacks mounted on the framework, cable engaging clutches at opposite ends of the jacks, one of the clutches being moved bodily by the jacks in said framework and the other clutch having a stationary position to the jacks, independent jacks to operate the clutches, and spring means to release the clutches.

ENOS B. PETRIE. Witnesses:

WARREN B. HU'roHmsoN, ARTHUR G. DANNELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents,

' Washington, D. G. 

